A robot moves at a constant speed. The distance it moves and the time it spends moving are shown in this table:
Time (in minutes) Distance (in kilometers)
101010 777
151515 10.510.510, point, 5
202020 141414
Write an equation to describe the relationship between ttt, the time, and ddd, the distance.

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth